Insulating saddle-staple.



. PATENTBD FEB. 1-2, 1907. w. T. H. TAYLOR, w. J. JENKS & R. N. DYER.

INSULATING SADDLE STAPLE.

APPLICATION FILED NOY. 20, 1906.

I n ven tors Attorneys 1 Vi nesss.

QJ MMMQMQ- UNITED STATES PATENT OFFIQ WALTER r. H. TAYLOR, orBRooKToN,iiAssAoriUsErrs, WILLIAM J. JENK,

or NEW YORK, N. Y., AND RIoIIARD N. DYER, or

JERSEY, ASSIGNORS TO INSULATING STAPLE COMPANY, OF NEW YORK, N. Y., ACORPORATION OF NE /V YORK.

INSULATING SADDLE-STAPLE.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed November 20, 1906. Serial No. $4,200.

T0 (0 112770777, 711 'm/(ty con/corn.-

Be it known that we, WALTER T. H. TAY- LOR, a citizen of the UnitedStates, residing at Brockton, in the county of Plymouth and State ofMassachusetts, WVILLIAM J. JENKS, a citizen of the United States,residing in the borough of Brooklyn, city of New York, in the county ofKings and State of New York, and RIcI-IARD N. DYER, a citizen of theUnited States, residing at East Orange, in the county of Essex and Stateof New Jersey, have invented a certain new and useful Improvement inInsulating Saddle-Staples, of which the following is a specification.

Our invention relates to an improvement upon the insulating saddle.staple covered by Patent No. 420,635, granted to Luther StieringerFebruary 4, 1890. Its object is to provide a saddle which will notbecome readily detached from the staple, will not unnecessarily reducethe available width for the reception of the wire between the legs ofthe staple, will not require the formation of shoulders on the innersides of the legs of the staple, will present the desirable thickness ofinsulation under the head of the staple, where the pressure upon thewire is exerted, and will be adapted to be made by automatic machineryrapidly and cheaply.

An attempt has been made to improve the Stieringer saddle-staple bythreading lengthwise upon the staple a strip of thin insulatingmateriabcovering both the inner and outer sides of the legs of thestaple near the head with a single thickness and giving a doublethickness under the head of the staple; but this staple is objectionablefor many reasons, among others that the covering of the outer sides ofthe legs of the staple adds to the cost of the article withoutincreasing its electrical efficiency, while the double thickness underthe head of the staple is not always effective, because one thickness isformed by the approaching ends of the strip of insulating material,leaving a break or gap in one thickness of the insulation at the verypoint where the integrity of the insulation is most important. Thisstaple, further, is difficult to manufacture.

Our improved insulating saddle-staple has all of the advantages and noneof the defects of the construction referred to.

In the accompanying drawings, Figure 1 is a perspective view, on anexaggerated scale, of our improved insulating saddle-staple. Fig. 2 isan elevation of the staple, the sad dlc being in section. Fig. 3 is acrosssection of the saddle and staple, taken at right angles to Fig. 2;and Fig. l is an elevation with the layers forming the saddle insection, showing the saddle about to be pierced by the staple andformed.

A is the metal staple, preferably having a curved or arch-shaped head. Bis the insulatingsaddle. The saddle is composed of two thicknesses ofrelatively thin insulating material, such as vulcanized fiber, formed ofa single piece of material folded upon itself. The upper thickness ofthe saddle is pierced with holes 5 6, punched therein, through which thelegs of the staple pass, thereby holding the saddle upon the staple byfriction, while the lower thickness of the material rests between thelegs of the staple be neath the upper thickness, being held in thatposition by reason of its being in one piece with the upper thickness.

In the manufacture of the saddle-staple a strip of the thin insulatingmaterial slightly moistened, so as to make it pliable, and having doublethe width of the saddle is folded longitudinally upon itself and is thencut transversely of the strip into short lengths, the upper layer of thefolded strip being punched with the holes 5 6. The dou ble thicknessfrom which the saddle is to be formed is held upon an anvil 7. Betweenthe folds of the saddle project spring-fingers 8 9. These spring-fingersserve to prevent the points of the staple from piercing the lower layerwhen they are driven through the holes 5 6 in the upper layer. Thefriction produced by driving points of the staple through the upperlayer presses the upper layer downwardly upon the spring-fingers 8 9,which in turn press upon the lower layer and bend it over the anvil, sothat when the staple-points reach the lower layer they strike it at suchan angle that they slide along its surface without cutting into it. Thespring-lingers are then withdrawn. A the same time that the staple isdriven through the holes 5 6 by means of the driver 10 the former 11 ismoved forward and EAST ORANGE, NE'W presses both thicknesses of theinsulating; material down upon the anvil 7, thus giving form to thesaddle. The folding of the insulating-strip and the forming of thesaddle do not cause the insulating material to crack or break, onaccount of the pliability produced by the moistening of the material.The subsequent drying of the material causes it to return to its hardand horn-like condition, the saddle retaining its form. t Will heobserved that both thieknesses of the insulation under the head of thestaple are continuous or unbroken throughout their opposed surfaees andalso that the saddle is made of a single piece of insulating materialfolded laterally with respect to a plane pass- 5 ing through the legs ofthe staple, the upper thickness of the fold only being piereed hy thelegs of the staple.

hat We claim is- 1. As a new article of inanufaeture, an insulatingsad.dlestaple having a saddle which pierced by the legs of the stapleand is held thereon by friction, sueh saddle presenting a singlethickness of insulation on the inner sides of the legs of the staple,and a double thiekness of insulation under the head of the j staple,both thicknesses of insulation under l the head of the sta'ile heincontinuous or i D unbroken, substantially as set forth.

2. As a new article of manufacture, an insulating saddle-staple having asaddle made of two thioknesscs of insulating material formed of onepiece of material folded. upon itself at right angles to the plane ofthe legs of the staple, one of such thicknesses only being pierced bythe legs of the staple, substantially as set forth.

As a new artiele of manufacture, an in sulating saddle-staple having asaddle made of two thicknesses of insulating material formed of onepiece of material folded upon itself at right angles to the plane of thelegs ofthe staple, the upper thickness only being piereed hy the legs ofthe staple, suhstantially as set forth.

This specification. signed and. witnessed this 9th day of November,1906.

lVALlER T. H. TAYIAJR. WILLIAM J. J EN KS. RICHARD N. DYEH.

lVitnesses to the signature 0 f WV alter '1. ll.

Taylor Faun M. BIXBY,

C. A. llolinuhn, n l'Vitnesses to the signatures of William Jv Jenksand. Richard. Dyer:

JNO. Ronr. TAYLOR,

JOHN L. Lo'rson.

